mm: highmem kernel-doc additions (77f6078a) · Commits · 戴 / test

mm/highmem.c

+26 −4

Original line number	Diff line number	Diff line
		@@ -104,8 +104,9 @@ static void flush_all_zero_pkmaps(void)
		flush_tlb_kernel_range(PKMAP_ADDR(0), PKMAP_ADDR(LAST_PKMAP));
		}

		/* Flush all unused kmap mappings in order to remove stray
		mappings. */
		/**
		* kmap_flush_unused - flush all unused kmap mappings in order to remove stray mappings
		*/
		void kmap_flush_unused(void)
		{
		spin_lock(&kmap_lock);
		@@ -163,6 +164,14 @@ start:
		return vaddr;
		}

		/**
		* kmap_high - map a highmem page into memory
		* @page: &struct page to map
		*
		* Returns the page's virtual memory address.
		*
		* We cannot call this from interrupts, as it may block.
		*/
		void kmap_high(struct page page)
		{
		unsigned long vaddr;
		@@ -170,8 +179,6 @@ void kmap_high(struct page page)
		/*
		* For highmem pages, we can't trust "virtual" until
		* after we have the lock.
		*
		* We cannot call this from interrupts, as it may block
		*/
		spin_lock(&kmap_lock);
		vaddr = (unsigned long)page_address(page);
		@@ -185,6 +192,10 @@ void kmap_high(struct page page)

		EXPORT_SYMBOL(kmap_high);

		/**
		* kunmap_high - map a highmem page into memory
		* @page: &struct page to unmap
		*/
		void kunmap_high(struct page *page)
		{
		unsigned long vaddr;
		@@ -259,6 +270,12 @@ static struct page_address_slot page_slot(struct page page)
		return &page_address_htable[hash_ptr(page, PA_HASH_ORDER)];
		}

		/**
		* page_address - get the mapped virtual address of a page
		* @page: &struct page to get the virtual address of
		*
		* Returns the page's virtual address.
		*/
		void page_address(struct page page)
		{
		unsigned long flags;
		@@ -288,6 +305,11 @@ done:

		EXPORT_SYMBOL(page_address);

		/**
		* set_page_address - set a page's virtual address
		* @page: &struct page to set
		* @virtual: virtual address to use
		*/
		void set_page_address(struct page page, void virtual)
		{
		unsigned long flags;

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